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Preparation method of hydrophilic polymer-modified polyurethane foaming plastic carrier

A technology of hydrophilic polymers and foam plastics, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., and can solve the difficulties of film formation, weak film formation, film formation, etc. problems, to achieve the effect of convenient operation, high economic value and simple process

Active Publication Date: 2014-03-12
山东青素环保材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problem of suspended fillers is the problem of film formation, difficulty in film formation or weak film formation

Method used

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  • Preparation method of hydrophilic polymer-modified polyurethane foaming plastic carrier
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  • Preparation method of hydrophilic polymer-modified polyurethane foaming plastic carrier

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preparation example Construction

[0022] A preparation method for a hydrophilic polymer modified polyurethane foam carrier, comprising the following steps:

[0023] Step 1) Cut the polyurethane soft foam into pieces according to a certain shape, clean the broken foam and dry it for use;

[0024] Step 2) According to the treatment of different hydrophilic polymers, prepare starch aqueous solution, sodium carboxymethylcellulose aqueous solution, polysuccinimide N,N-dimethylformamide solution of appropriate concentration;

[0025] Step 3) immerse the polyurethane foam in the starch aqueous solution, sodium carboxymethylcellulose aqueous solution, and polysuccinimide N, N-dimethylformamide solution for 5-60 minutes, and vacuumize to make The plastic foam is filled with solution;

[0026] Step 4) Move the polyurethane foam soaked by the starch aqueous solution and sodium carboxymethyl cellulose aqueous solution into a 0.01-1mol / L crosslinking agent aqueous solution, adjust the pH of the sodium hydroxide solution t...

Embodiment 1

[0034] Implementation of Starch Modified Polyurethane Foam

[0035] Cut the polyurethane soft foam into small cubes of 10mm×10mm×10mm, wash the broken foam and dry it for later use;

[0036] Weigh 1g of water-soluble starch and 99g of water to prepare a 1% by weight starch solution. Take the polyurethane foam and immerse it in the starch solution that has just been prepared, and vacuumize it so that the plastic foam is filled with the solution. Take out the foam plastics and immerse them in 0.01mol / L, 0.1mol / L, 1mol / L cross-linking agent aqueous solution respectively, adjust the pH to 10 with sodium hydroxide solution, react in a constant temperature water bath at 75°C for 4 hours, take it out, and rinse with water To neutral, squeeze out the water in the foam and dry it in a constant temperature drying oven at 80°C.

[0037] Table 1. Changes in parameters of starch after cross-linking modification of polyurethane foam.

[0038] Table 1 Changes of polyurethane foam paramete...

Embodiment 2

[0043] Implementation of Sodium Carboxymethyl Cellulose Modified Polyurethane Foam

[0044] Cut the polyurethane foam into small cubes of 10mm×10mm×10mm, wash the broken foam and dry it for use.

[0045]Weigh 1g of sodium carboxymethylcellulose and 99g of water to prepare a 1% by weight starch solution. Take the polyurethane foam and immerse it in the sodium carboxymethyl cellulose solution that has just been prepared, and then vacuumize it so that the plastic foam is filled with the solution. Take out the foam plastics and immerse them in 0.01mol / L, 0.1mol / L, and 1mol / L crosslinking agent aqueous solutions respectively, and adjust the pH to 10 with sodium hydroxide solution. Take it out after reacting in a constant temperature water bath at 75°C for 4 hours, soak it with water until neutral, squeeze out the water in the foam and dry it in a constant temperature drying oven at 80°C.

[0046] Table 2 shows the parameter changes of sodium carboxymethyl cellulose after polyuret...

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Abstract

The invention discloses a preparation method of a hydrophilic polymer-modified polyurethane foaming plastic carrier. The preparation method comprises steps of: 1) cutting polyurethane flexible foam into pieces; 2) preparing an aqueous starch solution having a proper concentration, an aqueous sodium carboxymethylcellulose solution having a proper concentration, a N,N-dimethyl formamide solution of polybutanimide having a proper concentration; 3) dipping polyurethane foaming plastic into the aqueous starch solution, the aqueous sodium carboxymethylcellulose solution and the N,N-dimethyl formamide solution of the polybutanimide; and then transferring the polyurethane foaming plastic into an aqueous cross-linking agent solution and heating; and 4) taking the foaming plastic out, washing and drying. The preparation method is simple in technology and convenient in operation. A microbial carrier which has an advantage of cost performance and is used for sewage treatment can be obtained after modification.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for preparing a hydrophilic polymer-modified polyurethane foam carrier. Background technique [0002] In sewage treatment, porous carrier filler can be used as a carrier for microbial attachment and growth. Since the 1970s, researchers have done a lot of research on the improvement of biological carriers for sewage treatment: from the early research on fixed packing and granular hard packing, to the suspension developed on the basis of the former two filler. In the early 1990s, a new type of lightweight and freely movable suspended filler was successfully developed, which opened a new direction for water treatment. In the past 10 years, the biofilm process of suspended fillers has developed rapidly. Suspended fillers are almost used in the treatment of domestic sewage, industrial wastewater, and micro-polluted source water. It can be said that the application of biologi...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J3/24C08L75/04C08L3/02C08L1/26C08L79/08C08K5/1515C08K5/07C08K3/32C02F3/34
Inventor 冯芳王东田耿佳陆树苹
Owner 山东青素环保材料有限责任公司
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